A frustrated bimeronium: Static structure and dynamics
- 1 February 2021
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 118 (5), 052411
- https://doi.org/10.1063/5.0034396
Abstract
We show a topological spin texture called “bimeronium” in magnets with in-plane magnetization. It is a topological counterpart of skyrmionium in perpendicularly magnetized magnets and can be seen as a combination of two bimerons with opposite topological charges. We report the static structure and spin-orbit-torque-induced dynamics of an isolated bimeronium in a magnetic monolayer with frustrated exchange interactions. We study the anisotropy and magnetic field dependences of a static bimeronium. We also explore the bimeronium dynamics driven by the damping-like spin-orbit torque. We find that the bimeronium shows steady rotation when the spin polarization direction is parallel to the easy axis. Moreover, we demonstrate the annihilation of the bimeronium when the spin polarization direction is perpendicular to the easy axis. Our results are useful for understanding the fundamental properties of bimeronium structures and may offer an approach to build bimeronium-based spintronic devices.Funding Information
- Guangdong Basic and applied Research Foundation (2019A1515110713)
- Australian Research Council (DP200101027)
- Japan Society for the Promotion of Science (JP18H03676, JP17K05490, JP20F20363)
- Core Research for Evolutional Science and Technology (JPMJCR16F1, JPMJCR20T2)
- Shenzhen Peacock Plan (KQTD20180413181702403)
- National Natural Science Foundation of China (12004320, 51771127, 51571126, 51772004, 11974298, 61961136006)
- National University of Science and Technology (K2-2019-006)
- Shenzhen Key Laboratory Fund (ZDSYS201603311644527)
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